(function ($) {
    $.fn.extend({
        Scroll: function (opt) {
            //参数初始化
            if (!opt) var opt = {};
            var timerID;
            var _this = this.eq(0).find("ul:first");
            var lineH = _this.find("li:first").height(), //获取行高
                line = opt.line ? parseInt(opt.line, 10) : parseInt(this.height() / lineH, 10), //每次滚动的行数，默认为一屏，即父容器高度
                speed = opt.speed ? parseInt(opt.speed, 10) : 500; //卷动速度，数值越大，速度越慢（毫秒）
            timer = opt.timer //?parseInt(opt.timer,10):3000; //滚动的时间间隔（毫秒）
            if (line == 0) line = 1;
            // var upHeight = 0 - line * lineH;
            var upHeight = 0 - 1 * lineH;
            //滚动函数
            var scrollUp = function () {
                _this.animate({
                    marginTop: upHeight
                }, speed, function () {
                    for (i = 1; i <= line; i++) {
                        _this.find("li:first").appendTo(_this);
                    }
                    _this.css({
                        marginTop: 0
                    });
                });

            }
            //Shawphy:向下翻页函数
            var scrollDown = function () {
                for (i = 1; i <= line; i++) {
                    _this.find("li:last").show().prependTo(_this);
                }
                _this.css({
                    marginTop: upHeight
                });
                _this.animate({
                    marginTop: 0
                }, speed);
            }
            //Shawphy:自动播放
            var autoPlay = function () {
                if (timer) timerID = window.setInterval(scrollUp, timer);
            };
            var autoStop = function () {
                if (timer) window.clearInterval(timerID);
            };
			autoPlay();
            //鼠标事件绑定
            // _this.hover(autoStop, autoPlay).mouseout();
        }
    })
})(jQuery);